this is an excellent 2 stroke, You dont need more cylinders you need a fly wheel to keep momentum so it will run smooth, also you'll need to move the outake up more to the top for the engine to expel the water properly do these and this engine will run excellent 10/10

Thanks!
Yeah, Im' Working on it. Your Tips are good, I've just increased the density of the Flywheel. It Runs much better!
The only things i have to do ( Ithink) are Reduce the Fuel consumption and Make it less leaky.